*{margin:0;padding:0;}
/*最大屏幕时的栅格系统*/
@media screen and (min-width:1200px){
/*布局容器container是一样的*/	
	.container{
		margin:0 auto;
		width:1170px;
		padding:0 15px;
		box-sizing: border-box;
	}
/*row行继承上面container的宽度*/
	.container .row{
		width:100%;
		margin:0 -15px;		
	}
	.container .row div{
		float:left;
	}		
/*row下面col-lg的1到12列所占的尺寸,总的尺寸1140/12*/
	.container .row .col-lg-1{
		width:95px;
	}
	.container .row .col-lg-2{
		width:190px;
	}
	.container .row .col-lg-3{
		width:285px;
	}
	.container .row .col-lg-4{
		width:380px;
	}
	.container .row .col-lg-5{
		width:475px;
	}
	.container .row .col-lg-6{
		width:570px;
	}
	.container .row .col-lg-7{
		width:665px;
	}
	.container .row .col-lg-8{
		width:760px;
	}
	.container .row .col-lg-9{
		width:855px;
	}
	.container .row .col-lg-10{
		width:950px;
	}
	.container .row .col-lg-11{
		width:1045px;
	}
	.container .row .col-lg-12{
		width:1140px;
	}
	/*列偏移*/
	.container .row .col-lg-offset-1{
		margin-left:95px;
	}
	.container .row .col-lg-offset-2{
		margin-left:190px;
	}
	.container .row .col-lg-offset-3{
		margin-left:285px;
	}
	.container .row .col-lg-offset-4{
		margin-left:380px;
	}
	.container .row .col-lg-offset-5{
		margin-left:475px;
	}
	.container .row .col-lg-offset-6{
		margin-left:570px;
	}
	.container .row .col-lg-offset-7{
		margin-left:665px;
	}
	.container .row .col-lg-offset-8{
		margin-left:760px;
	}
	.container .row .col-lg-offset-9{
		margin-left:855px;
	}
	.container .row .col-lg-offset-10{
		margin-left:950px;
	}
}
